Green :
Flashing - The product is starting.
Lights up - The product is ready for operation but is not connected to the internet.
Flashing rapidly - The product is in Wi-Fi coupling mode.
Blue:
Lights up - The product is connected to the internet and is ready for operation.
Flashing - Product software is updating.
Orange:
Flashing slowly - The product is in room thermostat coupling mode.
Red:
Lights up - Internet connection was lost / fault
Purple:
Flashing 3 times - The product is being identified by the Apple Home app.